comparison: src/circularprimitive.h
src/circularprimitive.h
- changeset 232
- 8efa3a33172e
- child 247
- 07ad61423c3c
equal
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inserted
replaced
| 231:a9bf6bab5ea2 | 232:8efa3a33172e |
|---|---|
| 1 #pragma once | |
| 2 #include <glm/gtc/matrix_transform.hpp> | |
| 3 #include "basics.h" | |
| 4 #include "model.h" | |
| 5 #include "ldrawalgorithm.h" | |
| 6 | |
| 7 template<typename Fn> | |
| 8 void rasterize(const CircularPrimitive& circ, Fn&& fn) | |
| 9 { | |
| 10 std::vector<ModelElement> result; | |
| 11 const auto xform = [&circ](const glm::vec2& p, float y){ | |
| 12 return glm::vec3{circ.transformation * glm::vec4{p.x, y, p.y, 1}}; | |
| 13 }; | |
| 14 const glm::vec3 origin = xform({0, 0}, 0); | |
| 15 switch(circ.type) { | |
| 16 case CircularPrimitive::Circle: | |
| 17 ldraw::circle(circ.fraction.segments, circ.fraction.divisions, [&] | |
| 18 (const glm::vec2&, const glm::vec2& p1, const glm::vec2& p2){ | |
| 19 fn(edge(xform(p1, 0), xform(p2, 0))); | |
| 20 }); | |
| 21 break; | |
| 22 case CircularPrimitive::Disc: | |
| 23 ldraw::circle(circ.fraction.segments, circ.fraction.divisions, [&] | |
| 24 (const glm::vec2&, const glm::vec2& p1, const glm::vec2& p2){ | |
| 25 fn(triangle(origin, xform(p1, 0), xform(p2, 0))); | |
| 26 }); | |
| 27 break; | |
| 28 case CircularPrimitive::Cylinder: | |
| 29 ldraw::circle(circ.fraction.segments, circ.fraction.divisions, [&] | |
| 30 (const glm::vec2&, const glm::vec2& p1, const glm::vec2& p2){ | |
| 31 fn(quadrilateral(xform(p1, 1), xform(p2, 1), xform(p2, 0), xform(p1, 0))); | |
| 32 }); | |
| 33 break; | |
| 34 case CircularPrimitive::CylinderOpen: | |
| 35 rasterize(CircularPrimitive{ | |
| 36 .type = CircularPrimitive::Cylinder, | |
| 37 .fraction = circ.fraction, | |
| 38 .transformation = circ.transformation, | |
| 39 }, fn); | |
| 40 rasterize(CircularPrimitive{ | |
| 41 .type = CircularPrimitive::Circle, | |
| 42 .fraction = circ.fraction, | |
| 43 .transformation = circ.transformation, | |
| 44 }, fn); | |
| 45 rasterize(CircularPrimitive{ | |
| 46 .type = CircularPrimitive::Circle, | |
| 47 .fraction = circ.fraction, | |
| 48 .transformation = glm::translate(circ.transformation, {0, 1, 0}), | |
| 49 }, fn); | |
| 50 break; | |
| 51 case CircularPrimitive::CylinderClosed: | |
| 52 rasterize(CircularPrimitive{ | |
| 53 .type = CircularPrimitive::CylinderOpen, | |
| 54 .fraction = circ.fraction, | |
| 55 .transformation = circ.transformation, | |
| 56 }, fn); | |
| 57 rasterize(CircularPrimitive{ | |
| 58 .type = CircularPrimitive::Disc, | |
| 59 .fraction = circ.fraction, | |
| 60 .transformation = circ.transformation, | |
| 61 }, fn); | |
| 62 break; | |
| 63 case CircularPrimitive::DiscNegative: | |
| 64 { | |
| 65 unsigned int i = 0; | |
| 66 ldraw::circle(circ.fraction.segments, circ.fraction.divisions, [&] | |
| 67 (const glm::vec2&, const glm::vec2& p1, const glm::vec2& p2){ | |
| 68 constexpr glm::vec2 corners[4] = { | |
| 69 {+1, +1}, | |
| 70 {-1, +1}, | |
| 71 {-1, -1}, | |
| 72 {+1, -1}, | |
| 73 }; | |
| 74 const glm::vec2& corner = corners[i * 4 / circ.fraction.divisions]; | |
| 75 fn(triangle(xform(p2, 0), xform(p1, 0), xform(corner, 0))); | |
| 76 ++i; | |
| 77 }); | |
| 78 } | |
| 79 break; | |
| 80 case CircularPrimitive::Chord: | |
| 81 for (unsigned int i = 1; i < circ.fraction.segments; ++i) { | |
| 82 const glm::vec2& p1 = ldraw::rimpoint(circ.fraction.divisions, i); | |
| 83 const glm::vec2& p2 = ldraw::rimpoint(circ.fraction.divisions, i + 1); | |
| 84 fn(triangle(xform(p2, 0), xform(p1, 0), xform({1, 0}, 0))); | |
| 85 } | |
| 86 break; | |
| 87 } | |
| 88 } |
